Nexo has a system for planting plants with various stages of growth, an example of how to configure it.
delay the time in ticks that it takes to grow
probability to grow when the delay is passed
light_boost when it has light nearby it grows faster
next_stage you specify the next stage, it has to be an already created Nexo item.
The plants can have the stages you decide, and the stages have to be a model created by you and not by the plugin for it to work. Now let's explain each mechanic farmland_required It is to be placed only in fertile soil.